Schistosomiasis eradicated in Shanghai:another example for health promotion / 上海预防医学

This article summarized the history, achievements and experiences in controlling and eradicating schistosomiasis in Shanghai under the concerning of Chairman Mao, described the damage of schistosomiasis endemic and decision making as well as the achievement for elimination.The first tide of schistosomiasis elimination (1956-1969) was to mobilize people to involve into detection and treatment of disease.Combined with farmland renovation, snails were controlled in water conservancy facilities.By repeated molluscacide spraying, the snail density reduced remarkably.The second tide of schistosomiasis elimination was carried out during the difficult periods ( 1960-1975 ) . Snail control continued until schistosomiasis eliminated.New methods of detection and snail control were improved.Areas with snails were cleaned one by one until completely eliminated.The third tide of elimination was consolidation and surveillance (1975-1990).After repeated detection and surveillance, in total 30 000 oncomelania were captured in 22 towns, among which none was positive.Detection to 150 000 people was carried out, and no new infectious case was found.No new infectious case was found in middle school students, recruit workers and new students.After 35 years of efforts to the successful elimination of schistosomiasis in Shanghai, both the production of the farmlands and life expectancy increased.

Study on acute inhalation toxicity of Luowei,a plant molluscacide / 中国血吸虫病防治杂志

Objective To study the acute inhalation toxicity of 50% Luowei,a plant molluscacide,in rats. Methods Twenty adult Wistar rats,half male and half female,were given of 5000 mg/m3 of 50% Luowei through a dynamic inhalation de?vice and the death and recovery of the rats were observed within 14 days,and LC50 was drawn. Results After exposure,the ac?tivities of the rats decreased and a few individual animals had scratching symptom,but the symptom disappeared after the expo?sure. No animals died during the whole observation period. Therefore,the acute inhalation LC50 was greater than 5000 mg/m3 for rats,and Luowei belonged to low toxicity level. Conclusions 50% Luowei will not cause animal death if it is inhaled into ani?mal body. However,people still need to wear protective equipment in production and use.